Overall torture kinetic
Rate of threshold voltage change is not exactly proportional to gate current, but close to being so.
Surprisingly little drift. But the mosfet is likely very much damaged, so it doesn't make much sense.
I have only one more fresh mosfet remaining for experimenting (same model, IPD10N03LA). I plan doing a negative voltage torturing for comparison with positive. After that, I either order more of them (if I can), or move to experimenting with other mosfet models.
UPDATE: found one more!